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    SubjectHard lock on 2.6-test9 (More Info)
    Both SMP kernels (2.4 and 2.6) appear to have the same interrupt map 
    (cat /proc/interrupts):

    Kernel 2.4:

    CPU0 CPU1
    0: 10942 8009 IO-APIC-edge timer
    1: 199 208 IO-APIC-edge keyboard
    2: 0 0 XT-PIC cascade
    8: 1 0 IO-APIC-edge rtc
    12: 2275 1615 IO-APIC-edge PS/2 Mouse
    14: 57 56 IO-APIC-edge ide0
    16: 118 0 IO-APIC-level usb-uhci, eth0
    17: 5267 3420 IO-APIC-level ohci1394, Intel ICH4, nvidia
    18: 0 0 IO-APIC-level usb-uhci
    19: 0 0 IO-APIC-level usb-uhci
    23: 0 0 IO-APIC-level ehci_hcd
    24: 9083 3661 IO-APIC-level ioc0
    25: 42 0 IO-APIC-level ioc1
    NMI: 0 0
    LOC: 18878 18807
    ERR: 0
    MIS: 0

    Kernel 2.6:

    CPU0 CPU1
    0: 75737 51102 IO-APIC-edge timer
    1: 152 278 IO-APIC-edge i8042
    2: 0 0 XT-PIC cascade
    8: 1 0 IO-APIC-edge rtc
    12: 61 0 IO-APIC-edge i8042
    14: 22 1 IO-APIC-edge ide0
    16: 92 0 IO-APIC-level eth0
    17: 3 0 IO-APIC-level ohci1394, Intel 82801DB-ICH4
    23: 0 0 IO-APIC-level ehci_hcd
    24: 2635 715 IO-APIC-level ioc0
    25: 42 0 IO-APIC-level ioc1
    NMI: 0 0
    LOC: 126582 126581
    ERR: 0
    MIS: 0

    When I boot X under kernel 2.6, I see the additional nvidia interrupt
    path as per the 2.4 output (which was taken whilst I was running X).

    But, within seconds of this additional interrupt assignment appearing,
    2.6 dies a horrible death whilst 2.4 just keeps on rolling.

    Cheers,

    Dan.


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